I only have two earphones on those pages, the HJE350 and the HJE450. The HJE350 sounds good, however the newer HJE355 sounds much better. The HJE450 has stronger bass but much less detail than the HJE355. In the US the HJE355 is only around $18, while on Amazon UK it is under 20 quid. The RP-HJE450 is only $24 on Amazon US, compared to 30 quid($48) on the website you linked to. How much of a discount can you get? Unless it is at least 50%, it doesn't seem worth it to get the HJE350 instead of the HJE355. Perhaps you should consider some JVC headphones and IEMs?

Which are the best p*nasonic headphones (p*nasonic because i get a discount on these)

Thanks

I have not owned anything panasonic in ages but if I had a good discount on them, I’d be looking at their best and you did mention that. Since I don't see you listing a budget, I'd be looking at their best ... while you did list a lot of information, reading this and providing as much info as possible does help members give you the best suggestions.

- Full size cans: I’d look at the pro DJ is 50 ohms or they have a similar one that’s 32 ohms.
- IEM: If you can find the RP-HJE900 Zirconia, aside from them I’d probably be looking at other brands.